The Islamic State is also on the defensive in Syria, where it has been making preparations for survival. Its propaganda arm is trying to soften the symbolic damage of losses on the battlefield.

Also in Syria, Russia and the Syrian government agreed to pause their bombardment of the city of Aleppo, where trapped civilians have suffered shattering airstrikes.

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CreditAl Drago/The New York Times

• “Stop whining.” Those were President Obama’s words for Donald J. Trump, as he called on the Republican candidate to stop trying to “discredit the elections.”

“It’s unprecedented,” Mr. Obama said of Mr. Trump’s accusations that the coming American presidential election is rigged. “It happens to be based on no facts.” Mr. Obama spoke at a news conference with the Italian prime minister.

Hacked emails released by WikiLeaks revealed several of the people Hillary Clinton passed over as a running mate, including Bill Gates, her rival for the Democratic nomination Bernie Sanders and Michael R. Bloomberg, the billionaire former New York mayor.

Mr. Trump and Mrs. Clinton, who has been off the campaign trail for days, face off in their third and final debate on Wednesday.

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CreditDiego Azubel/European Pressphoto Agency

• Thailand’s crown prince will ascend the throne, possibly as early as Friday, the head of the country’s military government said.

After the king died last week, the prince said he was not ready to take the throne.

• Ecuador’s government said it had “temporarily restricted” the internet access of the WikiLeaks founder Julian Assange at its embassy in London, after the whistle-blowing site published documents from Mrs. Clinton’s presidential campaign.

The government disputed the assertion by WikiLeaks that the decision was made because of U.S. pressure. President Rafal Correa recently told the Russian broadcaster RT that he’d prefer Mrs. Clinton over Mr. Trump.

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Zhang Sitong, a former firefighter, said he threw the phone on the ground when it started to vibrate and smoke.Published OnOct. 18, 2016

• Samsung, once the top phone maker in China’s vast smartphone market, is losing ground over its handling of the troubled Galaxy Note 7.

The South Korean company said the phone was safe in China even as it recalled more than two million of the phones in the United States and elsewhere.

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CreditJason Reed/Reuters

•The world’s top casinos have wooed China’s high rollers despite a strict ban on gambling on the mainland.

Now one of Australia’s largest resort and casino operators is in trouble, with 18 of its employees, including a senior executive visiting from Melbourne, detained by the Chinese authorities.

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CreditIlvy Njiokiktjien for The New York Times

• Europe is grappling with a new employment problem: how to find work for enough of the hundreds of thousands of migrants who’ve been streaming to the continent.

• Dalian Wanda Group, the Beijing-based entertainment conglomerate, held an event in Los Angeles to promote its $5 billion “movie metropolis” in Qingdao, about 450 miles north of Shanghai. The company, which has made huge investments in the Hollywood film industry, is offering a 40 percent rebate to studios that decide to film there.

• Like lots of lawyers, The Times’s David McCraw writes dozens of lawyer letters every year. He knew, of course, that the one he wrote to Donald J. Trump’s lawyer would be different. This is how Mr. McCraw reacted to the exchange that has since gone viral.

• We’re used to stories about Wall Street traders swindling investors. But one dealmaker and avid art collector claims he was scammed by a professor and her son, who sold him forged paintings.

But some analysts warn that a “severe fall” could be coming. They see a worrisome parallel in the current highs to the run-up to Black Monday, the global crash that sent stocks plummeting on this date in 1987.

The Dow Jones industrial average fell more than 500 points in New York, a 22.6 percent decline that remains the largest in the index’s history — even outstripping the 1929 plunge that heralded the Great Depression. Investors in U.S. stocks lost an estimated $1 trillion.

Computerized trading systems were new, enabling a sell-off at a scale not seen before. More than 600 million shares were traded in New York, above. The American Stock Exchange’s disk drives ran out of storage space.

High-speed trading and communications amplified the crash around the world. Japan took record losses. Hong Kong stopped trading for the rest of the week. Europe’s markets were in free fall. “We’ve never had anything like this,” a European trader said.

But a crisis on the scale of the Great Depression did not materialize. The drop, in the end, was far more modest than that of 2008. And the markets fully recovered within two years.